Method of separating dust from dust-laden air.



7 BEST AVAILABLE COP -No. 771,691.

PATENTED OCT. 4, 1904. W. E. ALLINGTON.. METHOD OF SEPA RATING DUST PROMDUST LADEN AIR.

APPLICATION FILED JUNE 2, 1904.

N0 MODEL.

Jieaezai will; Z0714 UNITED STATES BEST AVAILABLE COP Patented OctoberPATENT OE-EIcE WILLIAM E. ALLINGTON, 0F sAe INAW, MICHIGAN.

SPECIFICATION forming part of Letters Patent No 771,691, dated October4, 1904.

Application filed June 2, 1904. Serial No. 210,888. (No modell) To allwhom it may concern:

Be it known that I, WILLIAM E. ALLINeToN,a citizen of the United States,residing at Saginaw, in the county of Saginaw and State of Michigan,have invented new and useful Improvements in Methods of Separating Dustfrom Dust-Laden Air, of which the following is a specification. i

' This invention relates to anew and useful method of separating dust.from dust-laden air, and has for its principal object the delivering ofthe purified air into the atmosphere with the least possible retardinginfluence.

The method further aims to separate dust from the air by means of therotary or centrifugal motion of the dust-laden air within any suitablechamber or receptacle, to prevent back pressure on the means used forproducing the air-current, to secure the highest efliciency possiblefrom the rotary movement of the air for separating dust, to maintain asnear as possible the initial velocity of the en- 5 teringair-current tothe pointof free delivery,

and to produce a rapidly-rotating column of air within alessrapidly-revolving body of air surrounding said column and withoutany obstructions between the rotating column and the rotating outerbody.

To more clearly illustrate and set forth the method, reference is had tothe accompanying drawings, which show one form of an appa ratus in whichthe method can be carried out.

In the drawings, Figure 1 is a central ver-' tical section, and Fig. 2is a sectionalplan on line 2 2 of Fig. 1.

The apparatus shown in which the method can be carried out consists of areceptacle forming a chamber A, preferably cylindrical in form, intowhich is projected a current of dust-laden air through the inlet B. Theinlet B in the example of my invention shown in the drawings is attachedto the receptacle tangentially, thereby imparting a very rapid rotarymotion to the dust-laden air projected into said chamber. The chamber Aopens into a larger chamber, (shown by (l) Opposite the open end of thecham berAand in the enlarged end of the chamber .0 is the purifiedairoutlet or opening, which is shown by D and of substan tially-the samediameter as the chamber A. The outlet D is surrounded by aninwardlyprojecting guard D. The dust-laden air projected into thechamber A tangentially is given a very rapid revolving motion, whichrapidly-revolving motion continues through the'center of the chamber 0and which motion is continued substantially unabated until the purifiedair passes through the opening D. The location of the column ofrapidly-revolving air is indicated in the drawings by H, and thelinebetween the column and the outward body is shown by the dotted linesin m. G indicates the location of the surrounding body of air-,whichrevolves less rapidly than the revolving column H and receives itsimpulse from said column H. The result is that the dust in thedust-laden air is thrown by centrifugal force from the rapidly-revolvingcolumn l-I into the surrounding revolving body G, and the revolution ofthe air in the surrounding body G is suflicient to project the dustagainst the inner surface of the wall of chamber (J, from whence itpasses downwardly in spiral curves through the medium of a thin spiralcurrent of air passing downwardly toward the outlet end 'of the chamberC and is discharged through the opening E into a suitable recep tacleThe air passing from chamber A direct to the outlet D is in no wayretarded in its movement, and the dust in passing from the column H tothe surrounding body G causes no back pressure upon the fan, and; theseparation of dust from the dust-laden air is substantially perfect.

I have shown one and a very simple form of apparatus for carrying outthe method of separating dust from air; but it will be understood thatmany other forms of apparatus Inaybe used wherein a central column ofrapidly-revolving dust-laden air is surrounded by a body of airrevolving less rapidly.

Having thus described my invention, what I claim to have invented, anddesire to secure by Letters Patent of the United States, is

The method of separating dust from the initial current of dust-ladenair, which consists in continuously and rapidly rotating a centralcolumn of dust-laden air wlthm an outer sur-' 771,691 BEST'AVAILABLECOPcontinuously-rotating body of air In testimony whereof I have hereuntoset elocity receiving its impulse from said my hand in presence of twosubscribing \vit- IO and into which the dust separated nesses. Lidcolumn is driven, and then continu- T lelivering the dust from said bodyof WILLIAM E ALLIB (ITON' ;locity by the action of said body WhileWitnesses:

.irified air continuously escapes from one FREDERICK G. GooDwIN,

f the column of high velocity. L. F. MGCREA.

